improved various functions to support nodeinputarrays

app/node/inputarray.h

@@ -9,6 +9,8 @@ class NodeInputArray : public NodeInput
 public:
   NodeInputArray(const QString &id);
 
+  virtual bool IsArray() override;
+
   int GetSize() const;
 
   void Prepend();
@@ -22,6 +24,8 @@ public:
 
   NodeInput* ParamAt(int index) const;
 
+  const QVector<NodeInput*>& sub_params();
+
 signals:
   void SizeChanged(int size);